Warforged Wyvern

Multiattack. The wyvern makes two attacks: one with its bite and one with its stinger. While flying, it can use its claws in place of one other attack.

Bite. Melee Weapon Attack: +7 to hit, reach 10 ft., one creature. Hit: 11 (2d6 + 4) piercing damage.

Stinger. Melee Weapon Attack: +7 to hit, reach 10 ft., one creature. Hit: 11 (2d6 + 4) piercing damage. The target must make a DC 15 Constitution saving throw, taking 24 (7d6) poison damage on a failed save, or half as much damage on a successful one.

Claws. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) slashing damage.

The wyvern can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The wyvern regains spent legendary actions at the start of its turn.

Intergrated Weapons. The Warforged Wyvern has shoulder mounted range weapons that are not shown unless used as a legendary multiattack action:

Heavy Crossbow. Ranged Weapon Attack: +7 to hit, reach 100/400 ft., one target. Hit: 15 (3d10 + 3) piercing damage.

Grappling Stinger. Ranged Weapon Attack: +7 to hit, reach 10 ft., one target. Target must make a DC 15 Dexterity saving throw, or be grabbled by the stinger and suspended in the air.